Answers

Add 90/84 and 18/90

1^st number: 1 6/84, 2^nd number: 18/90

90/84 + 18/90 is 89/70.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 90 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 84 × 15 = 1260,
   90/84 = 90 × 15/84 × 15 = 1350/1260
3. Likewise, for the 2nd fraction, since 90 × 14 = 1260,
   18/90 = 18 × 14/90 × 14 = 252/1260
4. Add the two like fractions:
   1350/1260 + 252/1260 = 1350 + 252/1260 = 1602/1260
5. 1602/1260 simplified gives 89/70
6. So, 90/84 + 18/90 = 89/70
   In mixed form: 119/70

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